Cellosize

Cellosize Enzyme, Resistant Hydroxyethyl Cellulose, 1984 Product Bulletin, Union Carbide Corp., Old Ridgebury Road, Danbury, CT 06817. 

Then, with a moderate stirring speed, add 4.00 g of Cellosize hydroxy-ethyl cellulose WP-300 (a protective colloid), 2.00 g of Tergitol NP-40, 2.60 g of Tergitol NP-15 (two nonionic surfactants), 2.20 g of Alcolac Siponate DS-4 (an anionic surfactant), an 0.40 g of ammonium bicarbonate. 

The phase transfer catalyzed alkylation reaction of dodecyl phenyl glycidyl ether (DPGE) with hydroxyethyl cellulose (HEC) was studied as a mechanistic model for the general PTC reaction with cellulose ethers. In this way, the most effective phase transfer catalysts and optimum reaction concentrations could be identified. As a model cellulose ether, CELLOSIZE HEC11 was chosen, and the phase transfer catalysts chosen for evaluation were aqueous solutions of choline hydroxide, tetramethyl-, tetrabutyl-, tetrahexyl-, and benzyltrimethylammonium hydroxides. The molar A/HEC ratio (molar ratio of alkali to HEC) used was 0.50, the diluent to HEC (D/HEC) weight ratio was 7.4, and the reaction diluent was aqueous /-butyl alcohol. Because some of the quaternary ammonium hydroxide charges would be accompanied by large additions of water, the initial water content of the diluent was adjusted so that the final diluent composition would be about 14.4% water in /-butyl alcohol. The results of these experiments are summarized in Table 2. 

Table 2. Synthesis of HMHEC polymers by phase transfer catalysis from CELLOSIZE HEC QP-300...

CELLOSIZE is Union Carbide s trademark for its hydroxyethyl cellulose (HEC) polymer. 

Grafting reactions carried out in the homogeneous medium for carboxymethyl cellulose, methyl cellulose, and hydroxyethyl cellulose, always achieved higher degree of grafting efficiency than those samples such as cellulose, ethyl cellulose and acetyl cellose, irradiated in the hetero-geneus medium. 

Ink-jet Continuous Drop on demand Bubble Vegetable oil Rosin ester Cellosics Synthetic polymers Acrylated ester Water Alcohols Esters Ketones 80-100 1-80 No. 4 Cup ... 

Cellosize HEC cellulose hydroxyethyl ether cellulose hydr-oxyethylate ethylhydroxy cellulose ethylose HEC HE cellulose 2-hydroxyethyl cellulose ether hydroxyethyl ether cellulose hydroxyethyl starch hyetellose Natrosol oxycellu-lose Tylose PHA. 

Specific gravity 1.38-1.40 for Cellosize 1.0033 for a 2% w/v aqueous hydroxyethyl cellulose solution. 

Cellosize 100% through a US 80 mesh (177pm) Natrosol (regular grind) 10% retained on a US 40 mesh (420 pm) ... 

Viscosity (dynamic) hydroxyethyl cellulose is available in a wide range of viscosity types e.g. Cellosize is manufactured in 11 regular viscosity grades. Hydroxyethyl cellulose grades differ principally in their aqueous solution viscosities which range from 2-20 000 mPas for a 2% w/v aqueous solution. Two types of Cellosize are produced, a WP-type, which is a normal-dissolving material, and a QP-type, which is a rapid-dispersing material. 

For the standard Cellosize grades and types available and their respective viscosity ranges in aqueous solution, see Table 111. 

Table III Approximate viscosities of various grades of aqueous Cellosize (Amerohol Corp.) solutions at 25°C.

Cellosize viscosity grades are available in narrower ranges, as noted by the Low and High designation. 

Hydroxyethyl cellulose has good tolerance for dissolved electrolytes, although it may be salted out of solution when mixed with certain salt solutions. For example, the following salt solutions will precipitate a 10% w/v solution of Cellosize WP-09 and a 2% w/v solution of Cellosize WP-4400 sodium carbonate 50% and saturated solutions of aluminum sulfate ammonium sulfate chromic sulfate disodium phosphate magnesium sulfate potassium ferrocyanide sodium sulfate sodium sulfite sodium thiosulfate and zinc sulfate. 

Amerchol Corp. Technical literature Cellosize, hydroxyethyl cellulose, 1993. 

Cellosize hydroxyethylcellulose product literature. Union Carbide Corporation. 

Holhrey JD, Rogers RD, Spear SK, Swatloski RP. 2002. Dissolution of cellose with ionic hquids. J Am Chem Soc 724 4974-4975. 

In equipment similar to that used in Procedure 5-3 with provisions for maintaining a nitrogen atmosphere in the system, 210.75 gm of deionized water, 0.75 gm of Tergitol-7 (sodium heptadecyl sulfate, an anionic surfactant from Union Carbide), 12.5 gm of Cellosize WP-09 (a protective colloid from Union Carbide) and 1 gm of potassium persulfate is blended under nitrogen with agitation. Then 25 gm of vinyl acetate is added and the mixture is heated to 70°C. When the polymerization has started, with stirring, over a 2- to 3-hr period, 250 gm of vinyl acetate is added. The temperature is maintained at 70°-80°C. After the addition has been completed, heating at 70°-80°C is continued for an additional 30 min. The residual monomer content of this latex is less than l . ... 

To a 1-liter resin kettle equipped with a reflux condenser, an explosion-proof stirrer, a thermometer and temperature controller, and a nitrogen inlet is charged 204.00 gm of deionized water. Then 6.00 gm of Cellosize hydroxyethyl cellulose WP-300, 3.00 gm of Tergitol NP-40, 3.90 gm of Tergitol NP-15 (two nonionic surfactants), 3.3 gm of Siponate DS-4 (an anionic sufactant), and 0.6 gm of ammonium bicarbonate are added and the stirred mixture is blanketed with nitrogen and wanned to 55°C. This temperature is maintained for 20 min. A mixture of 18.00 gm of vinyl acetate, 4.50 gm of butyl acrylate, and 7.5 gm of vinyl neodecanoate is added, followed by 0.24 gm of ammonium persulfate. The reaction mixture is heated to 75°C and maintained at that temperature for 15 min to form the seed latex. 

Products and Uses Used in papers and textiles as a thickening and suspending agent for products. Precautions Can cause allergic reactions. Generally harmless when used for intended purposes. Synonyms cellosize Hydroxylated Lecithin... 

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